Home >Database >Mysql Tutorial >通过SSH通道来访问MySQL_MySQL

通过SSH通道来访问MySQL_MySQL

PHP中文网
PHP中文网Original
2016-05-27 14:12:5015253browse

许多时候当要使用Mysql时,会遇到如下情况:

出于数据库的安全性,数据库管理员在配置数据库时会为数据库增加一层“保护伞”,保护用户在连接数据库时的安全和信息不被泄漏,通常的做法就是配置SSH,也就是为数据库增加一个安全协议,这也导致了用户进行远程连接时的困难。
1. 信息比较重要,希望通信被加密。
2. 一些端口,比如3306端口,被路由器禁用。

相关mysql视频教程推荐:《mysql教程

对第一个问题的一个比较直接的解决办法就是更改mysql的代码,或者是使用一些证书,不过这种办法显然不是很简单。

这里要介绍另外一种方法,就是利用SSH通道来连接远程的Mysql,方法相当简单。

一、建立SSH通道

例如:

远程Mysql服务器ip:172.21.20.203

mysql端口号:3307 用户名:test 密码:123456

SSH通道IP:117.123.52.161 端口:79

用户名:admin

通过navicat for mysql客户端工具,

通常我们普通连接就是如下:

点击连接测试:弹出错误框,由于添加了SSH协议!所以我们要使用SSH通道,如下图:

这时候点击连接测试,可以连接进去,Test Success.

只需要在本地键入如下命令:

ssh -fNg -L 3307:127.0.0.1:3306 myuser@remotehost.com
The command tells ssh to log in to remotehost.com as myuser, go into the background (-f) and not execute any remote command (-N), and set up port-forwarding (-L localport:localhost:remoteport ). In this case, we forward port 3307 on localhost to port 3306 on remotehost.com.

二 、连接Mysql

例如:我们在终端输入:

ssh -fNg -p 79 -L 8989:172.21.20.203:3307 admin@117.123.52.161

现在,你就可以通过本地连接远程的数据库了,就像访问本地的数据库一样。

点击连接,Test Success

mysql -h 127.0.0.1 -P 3307 -u dbuser -p db
The command tells the local MySQL client to connect to localhost port 3307 (which is forwarded via ssh to remotehost.com:3306). The exchange of data between client and server is now sent over the encrypted ssh connection.

或者用Mysql Query Brower来访问Client的3307端口。

类似的,用PHP访问:

<?php
$smysql = mysql_connect( "127.0.0.1:3307", "dbuser", "PASS" );
mysql_select_db( "db", $smysql );
?>
Making It A Daemon
A quick and dirty way to make sure the connection runs on startup and respawns on failure is to add it to /etc/inittab and have the init process (the, uh, kernel) keep it going.
Add the following to /etc/inittab on each client:
sm:345:respawn:/usr/bin/ssh -Ng -L 3307:127.0.0.1:3306 myuser@remotehost.com
And that should be all you need to do. Send init the HUP signal ( kill -HUP 1 ) to make it reload the configuration. To turn it off, comment out the line and HUP init again.
bitsCN.com

 以上就是通过SSH通道来访问MySQL_MySQL的内容,更多相关内容请关注PHP中文网(www.php.cn)!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn